[julia-users] Nan is readed as NaN but is the name of cat. How to read this data ?

[paul analyst]

Nan is readed as NaN but Nan is the name of cat. How to read this data ? 
How to find the cat ?
I have data.txt file , UTF8

Lucy    cat
Fliper    dog
Mia    dog
Nan    cat
Snupy    dog

julia> data=readd
readdir readdlm
julia> data=readdlm("data.txt",'\t')
5x2 Array{Any,2}:
    "Lucy"    "cat"
    "Fliper"  "dog"
    "Mia"     "dog"
 NaN          "cat"
    "Snupy"   "dog"

julia> unique(data[:,1])
5-element Array{Any,1}:
    "Lucy"
    "Fliper"
    "Mia"
 NaN
    "Snupy"

julia> findin(data[:,1],["Fliper"])

1-element Array{Int32,1}:
 2

julia> findin(data[:,1],["Nan"])
0-element Array{Int32,1}

Paul